Wrench



Jan. 9, 1923. 1,441,934.,

6. KUHNS.

WRENCH.

FILED JUNEIZZ, 1221.

lthttented dart tit, llthildi GEORGE KUHIN$, F DUNCAN", OKLAHOMA.

WRENCH.

Application filed June 22,

To a, whom it may concern Be it known. that Gnonen KUHNS, a citizen oi the United States of America, residing at Duncan, in the county of Stephens and State of t lklahoma, has invented new and useful improvements in Wrenches of which the following is a specification.

'lhe object of the invention is to provide a simple and etiicicnt pipe or rod wrench wherein the inner or shank carrying jaw may readily be replaced or removed for repair or interchange to s lit the character of the work to be performed without necessitating the modification or reorganization of the tool in other respects; and. with this ob jeet in view the invention consists in a coni--:truction and combination of parts o'l" which a preferred cu'ibodiment shown in the ac- ('01 n pany i n g d r a win gs, wherein ll ignre 1 is a side view of a wrench head embodying the invention.

l igure 2 a tace view of the same.

ligure is a detail view in perspective 0t one oi the interehangeable or removable jaw members.

The wrench consir s essentially of outer and inner jaws 10 and 11 0t which the toriner is movable reiative to the latter and is carried by a swinging arm 12 pivotally mounted as at 13 to the shank 14: which carries the inner jaw.

The shank is bifurcated at the end adjacent to the jaws to form parallel, cheeks l5 between which the pivotal end or" the arm mix-lying the swinging jaw is arranged, and the inner or fixed jaw consists of complemental members 11 and 11 having ears 16 in the term of fiat plates of substantially 1921. Serial No. $79,596.

triangular form adapted to fit between the cheeks and completely occupy the space or interval between the facing surfaces thereof as indicated in Figure 2, the bars constituting the faces of the inner jaw members being deflected at their inner ends to form tongues 17 for engagement with oilset seats 18 in the shank said seats being disposed transversely in relation to the path of swinging movement of the arm The ears 1.6 and the cheeks 15 are provided with registering openings 19 and 20 for the reception of transverse pins 21 to lock the inner or fixed jaw members in place.

Obviously when the inner jaw members become worn or enlarged in any way they may be replaced or have special work jaws of different constructions or having difl'erent contours or forms of serrations may be substituted merely by the displacement ot the pins 21.

Having described the invention, what is claimed as new and useful is:--

A pipe wrench having a shank bifurcated at one end and carrying a swinging jaw of which the arm is pivotally mounted in the space between the cheeks of the bifurcation, complemental jaw members having ears disposed in the interval between said cheeks, the rear ends of said jaw members having downwardly deflected tongues and the shank having a transverse seat for interlocking engagement with said tongues, and means for preventing endwise movement of said ears.

In testimony whereof he attixes his signature.

GEORGE KUHNS. 

